He has two henchmen: Rodney and Bruce. A couple of big yet dumb goons.
He lives inside a penthouse apartment at the top of a tall building in New York City.
In his first appearance he was a short fat man in a white suit, but in his other appearances he was a tall thin man in a dark suit, he also had a new voice.
In his first appearance, in Burne's Blues Tortelli crashed into the hiding place of spies who were torturing Vernon Fenwick and his boss Burne Thompson, by tickling them with a feather. When the spies ran away Tortelli asked Vernon and Burne about the Turtles, and when they said they didn't know anything, Tortelli pulled out a feather to "make them talk."
In the second episode, "Case of the Hot Kimono", Tortelli (now in a different animation style and appearance), wants to find out where is the kimono that contents a map to hidden treasure, so he sends his henchmen to steal all kimonos in town. April O'Neil reported on TV about the theft of kimonos, so Turtteli sent his henchmen to capture her and Vernon.
In his penthouse Tortelli asked his victims about kimonos. When April refuses to talk, he tickled her bare foot with a feather, only for a few seconds, than he started to tickle Vernon on his socked foot.
The Turtles fond Don Turtelli with help the of April's aunt. Turtelli escaped, but is later caught by the Turtles, and handed to the police.
In his final appearance in, The Great Boldini, Turtelli hires his cousin, magician Boldini to steal Toretlini's emerald from a museum. But when Boldini goes in the museum basement to find the emerald and meet with Turtelli, two kids Zach and Catlin, friends of the Turtles follow them, and steal the emerald from them. However Turtelli capture the girl Catlin, and threatens the boy Zach that if he doesn't give him the emerald, he will tickle Catlin.
The times runs up for Zach, and when Turtelli was ready to tickle Catlin, asking her, Were do you want blondie, under your arm or soles of your feet, the Rat King appears. The kids use Turtelli's and Boldini's arguing with the Rat King to escape, but the villains make a deal, and the Rat King, with the help of his rats send everybody out of the museum, and lock the museum so they can capture the kids.
The kids hide the emerald, but the villains capture them, tie them up, and Turtelli begins tickling them on their bare feet with a feather. Catlin didn't break, but Zach after long periods of prolonged tickling cracks, and tell them where the emerald is.
Meanwhile, the Turtles get into the museum and save the kids, and catch Turtelli and Boldini, and hand them to the police.
He appears only in season 3 in the TMNT 1987 series. Turtelli appeared exclusively in the show's third season in 1989.
It should be noted that Don Turtelli's appearance and voice acting changes between episodes. The animation style from his second appearance was kept for his third.